About ExtJS4.1: Problems with shortcut key support_javascript skills
Question: A page has two panels, both of which have an [Add (F2)] button. How to support shortcut keys? Picture indication
The first implementation
It feels like it should be very simple. ExtJs provides "Ext.util.KeyMap", which makes it easy to support shortcut keys.
Code example
/// < ;reference path="Ext/ext-all-debug-w-comments.js" />
Ext.onReady(function () {
var viewport = Ext.create(' Ext.container.Viewport', {
layout: {
type: 'vbox',
align: 'stretch'
},
padding: 10,
items: [{
xtype: 'panel',
id: 'panelA',
title: 'Shortcut key test A',
tbar: [{
Text: 'Add (F2)'
xtype: 'panel',
id: 'panelB',
title: 'Shortcut key test B',
tbar: [{
text: 'Add (F2)'
}],
frame: true,
flex: 1,
html: 'Hello, the table or form shown here. '
}]
});
Ext.create('Ext. Util.Keymap ', {
target:' Panela ',
key: ext.eventobject.f2,
Fn: Function (key, EV) {
Alert (' Add a ');
ev.stopEvent();
return false;
});
Ext.create('Ext.util.KeyMap', {
target: 'panelB',
key: Ext.EventObject.F2,
fn: function (key, ev) {
alert('Add B');
ev. stopEvent();
return false;
}
});
});
Actual result
After opening the browser Pressing F2 directly has no effect; opening the browser and clicking A or B with the mouse and then pressing F2 also has no effect.
The second implementation
It turns out that the div element must add the attribute tabindex=0.
Code example
Copy code
///
Ext.onReady(function () {
var viewport = Ext.create('Ext.container.Viewport', {
layout: {
type: 'vbox',
align: 'stretch'
},
padding : 10,
items: [{
bar: [{
text: 'Add (F2)'
}],
frame: true, . autoEl : {
tag: 'div',
tabindex: 0
}
}, {
XType: 'Panel',
ID: 'Panelb',
Title: 'Shortcut key test B',
tbar: [{
text: 'Add (F2)'
}],
frame: true,
flex: 1,
html: 'Hello, the table or form shown here. ',
}]
});
Ext.create('Ext.util.KeyMap', {
target: 'panelA',
key: Ext.EventObject.F2,
fn: function (key, ev) {
alert('Add A'); 🎜> Ext. Create ('EXT.UTIL.KEYMAP', {
Target: 'Panelb',
Key: Ext.eventobject.f2,
Fn: Function (key, EV) {
Alert ('Add to B');
ev.stopEvent();
return false;
}
});
});
Actual results
Pressing F2 directly after opening the browser has no effect; opening the browser and clicking A or B with the mouse and then pressing F2 will have the effect.
The third implementation
To solve the problem of recognizing shortcut keys without clicking the div after opening the browser, you need to manually call the foucs() method.
Code example
///
Ext.onReady(function () {
var viewport = Ext.create('Ext.container.Viewport', {
layout: {
type: 'vbox',
align: 'stretch'
},
padding : 10,
items: [{
bar: [{
text: 'Add (F2)'
}],
frame: true, . autoEl : {
tag: 'div',
tabindex: 0
}
}, {
XType: 'Panel',
ID: 'Panelb',
Title: 'Shortcut key test B',
tbar: [{
text: 'Add (F2)'
}],
frame: true,
flex: 1,
html: 'Hello, the table or form shown here. ',
}]
});
Ext.create('Ext.util.KeyMap', {
target: 'panelA',
key: Ext.EventObject.F2,
fn: function (key, ev) {
alert('Add A'); 🎜> Ext. Create ('EXT.UTIL.KEYMAP', {
Target: 'Panelb',
Key: Ext.eventobject.f2,
Fn: Function (key, EV) {
Alert ('Add to B');
ev.stopEvent();
return false;
}
});
Ext.get('panelB'). focus();
});
Actual results
Open the browser and press F2 directly to have the effect; open the browser and click A or B with the mouse and then press F2 It works.

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